BACKGROUND: The third highest goalscorer in Bundesliga history, Heynckes is in his third spell at Bayern, winning back-to-back titles in 1989 and 1990 before being sacked in 1991, a decision general manager Uli Hoeness has always regretted. Heynckes also won the Champions League with Real Madrid during a career that alternated between Germany and Spain, finally returning to Bayern in 2011. He is due to retire at the end of the season, when he will be replaced by Pep Guardiola.

TACTICS: Heynckes began by making Bayern far more solid defensively than they had been under former coach Louis van Gaal. He cut down the space between different components of the team and stopped defence being exposed in one-on-one situations. Further up the field, he has allowed attacking players to become more fluid, while also adopting a Barcelona-style pressing approach to put their opponents under pressure.

SQUAD: Has integrated youngsters Toni Kroos and David Alaba into his squad while at the same time being mindful to keep everyone happy with a rotation policy that is not used purely because of injury. Got Franck Ribery to enjoy his football again and has put Bastian Schweinsteiger into his preferred central midfield position.

TRANSFERS: Raised an eyebrow when he championed the £15million purchase of Jerome Boateng, who had not impressed at Manchester City. Last summer added Javi Martinez - shattering the German transfer record by paying Athletic Bilbao £37million for the 24-year-old - who can play in defence but is mainly used in midfield.

QUIRKY FACT: Nicknamed Osram due to his face going red when he is under stress.

JURGEN KLOPP

BORN: June, 16 1967. Stuttgart.

AGE: 45.

PLAYING CAREER: Mainz.

COACHING CAREER: Mainz, Borussia Dortmund.

BACKGROUND: After an unremarkable playing career, Klopp immediately stepped into the role of manager and guided Mainz into the Bundesliga for the first time in their history. Also secured European football but was then relegated and resigned in 2008. He then took over at Borussia Dortmund, winning the title in 2011 and 2012. In the latter season he claimed a number of records, including greatest number of points (81), most games unbeaten in one campaign (28) and joint most wins (25). He also secured the club's first domestic double.

TACTICS: Over time, Klopp has turned Dortmund into an expansive, free-flowing outfit, who close down the opposition quickly and attack with pace. Their tactics have been compared to Arsenal, but it is more like Barcelona with a determination to create chances rather than keep the ball at all costs. Klopp is wedded to the Dortmund ideal of entertainment.

SQUAD: Has never been afraid to inject younger players, including Mario Gotze, who was just 17 when he was handed his debut, while accepting massive signings are not possible due to the financial mismanagement of the past. Has improved steadily each year, although the impending loss of Gotze and Robert Lewandowski suggest a reduction in status is imminent.

TRANSFERS: Lacking Bayern's huge wealth, Klopp opted to bring in younger players who could develop. Mats Hummels' arrival from Bayern is an obvious example. Shinji Kagawa was another notable arrival, while Robert Lewandowski cost barely £4million when he was captured from Lech Poznan. Last summer Marco Reus arrived from Borussia Monchengladbach for £16million.

QUIRKY FACT: In 1995 Klopp obtained a Diploma at Goethe University Frankfurt. He wrote his diploma thesis about Walking.